package com.jywl.util;
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;  
import java.nio.MappedByteBuffer;  
import java.nio.channels.FileChannel;  
import java.security.MessageDigest;  
  
import org.apache.commons.codec.digest.*;
import org.apache.commons.io.IOUtils;  
  
public class FileMd5 {  
      
     public static String getMd5ByFile(File file) throws FileNotFoundException {  
            String value = null;  
            FileInputStream in = new FileInputStream(file);  
        try {  
            MappedByteBuffer byteBuffer = in.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, file.length());  
            MessageDigest md5 = MessageDigest.getInstance("MD5");  
            md5.update(byteBuffer);  
            BigInteger bi = new BigInteger(1, md5.digest());  
            value = bi.toString(16);  
        } catch (Exception e) {  
            e.printStackTrace();  
        } finally {  
                if(null != in) {  
                    try {  
                    in.close();  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
            }  
        }  
        return value;  
        }  
     public static String getMd5ByFile(InputStream fis) throws IOException {  
    	  String md5 = DigestUtils.md5Hex(IOUtils.toByteArray(fis));    
         // IOUtils.closeQuietly(fis); 
          return md5;
     }  
 
  
}  